口算下面各题．7.6+1.5= 1﹣0.34= 4.32+0.5= 9.6﹣6.9=5﹣1.8= 1.05+0.5= 1.4+6= 0.39+0.15=
19175÷59＋678 36.5×1.4－8.51
()÷20-[(
14.8×6.3-6.3×6.5＋8.3×3.718.1＋（3－0.299÷0.23）×1
5.09－(0.09＋1.23) 9.36－(4.36－3.5)
7.5－2.45＋7.5＋2.45(-)×21+
)÷
20-[(
-
)×21+
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